Check Power - Panasonic KX-TGC450G Service Manual

9.1.1 Check Power
9.1.1.1 Base Unit
Is the AC Adaptor inserted into AC outlet? (*1)
Is output voltage of AC adaptor 5.5 V?
Check VDDC (1.2 V): Test Point [VDDC]
RSTN: Reset = "High"?
Check Xtal CLK = 13.824 MHz?
Check BBIC.
Cross Reference:
[4.3.4 Power Supply Circuit/Reset Circuit]
Note:
BBIC is IC501.
(*1) Refer to [3 Specifications]
(*2) Refer to [14.1 Base Unit (Main)]
9.1.1.2 Handset
Is the battery inserted BATT+ and BATT-?
Is the voltage of BATT+ 2.3 V more?
Is the voltage of +1.8V about 1.8 V?
Is the voltage of CP3V about 3.0 V?
Is the voltage of CP4V about 4.0V ?
(When LED is On)
Does BBIC (IC1: 7) oscillate at 10.368 MHz?
Check BBIC (IC1).
Cross Reference:
[4.3.4 Power Supply Circuit/Reset Circuit]
Note:
(*1) Refer to [13.4 Handset (Main)]
YES
(*2)
OK
(*2)
YES
YES
for part number and supply voltage of AC adaptor.
YES
(*1)
YES
(*1)
YES
(*1)
YES
(*1)
YES
YES
NO
AC Adaptor.
Check
NO
Check Power Supply Circuit.
NO
Check Reset Circuit.
NO
Check X501.
NO
Check F1 is not open.
Check the battery and around BATT+ and
BATT- are not shorted.
NO
Check Power Supply Circuit/Reset Circuit .
NO
NO
Check BBIC (IC1).
NO
Check X1.
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YES